/[MITgcm]/MITgcm/verification/cpl_aim+ocn/code_ocn/CPP_EEOPTIONS.h
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Contents of /MITgcm/verification/cpl_aim+ocn/code_ocn/CPP_EEOPTIONS.h

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Revision 1.5 - (show annotations) (download)
Sat Oct 9 20:44:36 2004 UTC (17 years, 3 months ago) by jmc
Branch: MAIN
CVS Tags: checkpoint57t_post, checkpoint57o_post, checkpoint57v_post, checkpoint57m_post, checkpoint57s_post, checkpoint57k_post, checkpoint57d_post, checkpoint57g_post, checkpoint57b_post, checkpoint57c_pre, checkpoint55j_post, checkpoint56b_post, checkpoint57i_post, checkpoint57y_post, checkpoint57e_post, checkpoint55h_post, checkpoint57g_pre, checkpoint56c_post, checkpoint57y_pre, checkpoint57f_pre, checkpoint57a_post, checkpoint55g_post, checkpoint55f_post, checkpoint57r_post, checkpoint58, checkpoint57a_pre, checkpoint55i_post, checkpoint57, checkpoint56, eckpoint57e_pre, checkpoint57h_done, checkpoint57x_post, checkpoint57w_post, checkpoint57p_post, checkpint57u_post, checkpoint57f_post, checkpoint58a_post, checkpoint57q_post, checkpoint57z_post, checkpoint57c_post, checkpoint57j_post, checkpoint57h_pre, checkpoint57l_post, checkpoint57h_post, checkpoint56a_post
Changes since 1.4: +3 -1 lines
File MIME type: text/plain
add include "BUILD_INFO.h"

1 C $Header: /u/gcmpack/MITgcm/verification/cpl_aim+ocn/code_ocn/CPP_EEOPTIONS.h,v 1.4 2004/04/17 22:42:06 jmc Exp $
2 C $Name: $
3
4 CBOP
5 C !ROUTINE: CPP_EEOPTIONS.h
6 C !INTERFACE:
7 C include "CPP_EEOPTIONS.h"
8 C
9 C !DESCRIPTION:
10 C *==========================================================*
11 C | CPP\_EEOPTIONS.h |
12 C *==========================================================*
13 C | C preprocessor "execution environment" supporting |
14 C | flags. Use this file to set flags controlling the |
15 C | execution environment in which a model runs - as opposed |
16 C | to the dynamical problem the model solves. |
17 C | Note: Many options are implemented with both compile time|
18 C | and run-time switches. This allows options to be |
19 C | removed altogether, made optional at run-time or |
20 C | to be permanently enabled. This convention helps |
21 C | with the data-dependence analysis performed by the |
22 C | adjoint model compiler. This data dependency |
23 C | analysis can be upset by runtime switches that it |
24 C | is unable to recoginise as being fixed for the |
25 C | duration of an integration. |
26 C | A reasonable way to use these flags is to |
27 C | set all options as selectable at runtime but then |
28 C | once an experimental configuration has been |
29 C | identified, rebuild the code with the appropriate |
30 C | options set at compile time. |
31 C *==========================================================*
32 CEOP
33
34 #ifndef _CPP_EEOPTIONS_H_
35 #define _CPP_EEOPTIONS_H_
36
37 C In general the following convention applies:
38 C ALLOW - indicates an feature will be included but it may
39 C CAN have a run-time flag to allow it to be switched
40 C on and off.
41 C If ALLOW or CAN directives are "undef'd" this generally
42 C means that the feature will not be available i.e. it
43 C will not be included in the compiled code and so no
44 C run-time option to use the feature will be available.
45 C
46 C ALWAYS - indicates the choice will be fixed at compile time
47 C so no run-time option will be present
48
49 C Flag used to indicate whether Fortran formatted write
50 C and read are threadsafe. On SGI the routines can be thread
51 C safe, on Sun it is not possible - if you are unsure then
52 C undef this option.
53 #undef FMTFTN_IO_THREADSAFE
54
55 C-- Control MPI based parallel processing
56 CXXX We no longer select the use of MPI via this file (CPP_EEOPTIONS.h)
57 CXXX To use MPI, use an appropriate genmake2 options file or use
58 CXXX genmake2 -mpi .
59 CXXX #undef ALLOW_USE_MPI
60 CXXX #undef ALWAYS_USE_MPI
61
62 C-- Control use of communication with other component:
63 C allow to import and export from/to Coupler interface.
64 #define COMPONENT_MODULE
65
66 C-- Control use of communication that might overlap computation.
67 C Under MPI selects/deselects "non-blocking" sends and receives.
68 #define ALLOW_ASYNC_COMMUNICATION
69 #undef ALLOW_ASYNC_COMMUNICATION
70 #undef ALWAYS_USE_ASYNC_COMMUNICATION
71 C-- Control use of communication that is atomic to computation.
72 C Under MPI selects/deselects "blocking" sends and receives.
73 #define ALLOW_SYNC_COMMUNICATION
74 #undef ALWAYS_USE_SYNC_COMMUNICATION
75
76 C-- Control use of JAM routines for Artic network
77 C These invoke optimized versions of "exchange" and "sum" that
78 C utilize the programmable aspect of Artic cards.
79 #undef LETS_MAKE_JAM
80 #undef JAM_WITH_TWO_PROCS_PER_NODE
81
82 C-- Control storage of floating point operands
83 C On many systems it improves performance only to use
84 C 8-byte precision for time stepped variables.
85 C Constant in time terms ( geometric factors etc.. )
86 C can use 4-byte precision, reducing memory utilisation and
87 C boosting performance because of a smaller working
88 C set size. However, on vector CRAY systems this degrades
89 C performance.
90 #define REAL4_IS_SLOW
91
92 C-- Control use of "double" precision constants.
93 C Use D0 where it means REAL*8 but not where it means REAL*16
94 #define D0 d0
95
96 C-- Control XY periodicity in processor to grid mappings
97 C Note: Model code does not need to know whether a domain is
98 C periodic because it has overlap regions for every box.
99 C Model assume that these values have been
100 C filled in some way.
101 #undef ALWAYS_PREVENT_X_PERIODICITY
102 #undef ALWAYS_PREVENT_Y_PERIODICITY
103 #define CAN_PREVENT_X_PERIODICITY
104 #define CAN_PREVENT_Y_PERIODICITY
105
106 #endif /* _CPP_EEOPTIONS_H_ */
107
108 #include "CPP_EEMACROS.h"
109
110 #include "BUILD_INFO.h"

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